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Bulk-scaffolded hydrogen storage and releasing materials and methods for preparing and using same




Title: Bulk-scaffolded hydrogen storage and releasing materials and methods for preparing and using same.
Abstract: Compositions are disclosed for storing and releasing hydrogen and methods for preparing and using same. These hydrogen storage and releasing materials exhibit fast release rates at low release temperatures without unwanted side reactions, thus preserving desired levels of purity and enabling applications in combustion and fuel cell applications. ...


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USPTO Applicaton #: #20090258215
Inventors: S. Thomas Autrey, Abhijeet J. Karkamkar, Anna Gutowska, Liyu Li, Xiaohong S. Li, Yongsoon Shin


The Patent Description & Claims data below is from USPTO Patent Application 20090258215, Bulk-scaffolded hydrogen storage and releasing materials and methods for preparing and using same.

CROSS REFERENCE TO RELATED APPLICATION

This application is a Continuation-In-Part of Divisional application Ser. No. 11/941,549 filed 16 Nov. 2007, which in turn is a Divisional of U.S. application Ser. No. 10/778,997 filed 12 Feb. 2004, now granted as U.S. Pat. No. 7,316,788.

GOVERNMENT SUPPORT

This invention was made with Government support under Contract DE-AC0676RLO-1830 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.

FIELD OF THE INVENTION

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The present invention relates generally to materials and processes for storing hydrogen, and uses for same. More particularly, the present invention relates to bulk-scaffolded materials, compounds, materials, and combinations that provide storage and release of bulk quantities of hydrogen at lower release temperatures and faster release rates for operation of hydrogen-fueled on-board and off-board devices and applications.

BACKGROUND

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OF THE INVENTION

The Department of Energy (DOE) issued a challenge for hydrogen storage related technologies during 2003 to compliment existing programs on Hydrogen Production and Fuel Cell development. Part of the challenge involved proposed project milestones in calendar years 2010 and 2015 for the development of new materials and technologies relating to storing hydrogen for use as vehicle energy sources. Four technologies for storing hydrogen are under investigation in the technical art: (1) storage as simple metal hydrides, e.g., MgH2, (2) storage on carbon materials, including single-walled carbon nanotubes, (3) storage as complex metal hydrides, e.g., NaAlH4, and (4) chemical hydrogen storage, e.g. NHxBHx, where x=1 to 4. The technical developments related to chemical hydrogen storage technology are discussed further hereafter. Baitalow et al. have shown the potential for use of N-B-H compounds including ammonia borane (AB), NH3BH3, as a hydrogen storage material. Jaska et al. report hydrogen formation in AB is likely to occur by an intermolecular dimerization pathway as shown in reaction [1], although a two-step mechanism shown in reactions [2] and [3] is not ruled out:


2NH3BH3→NH3BH2—NH2BH3+H2  [1]


NH3BH3→NH2═BH2+2H2  [2]


2NH2═BH2→NH3BH2—NH2BH3  [3]

Each step that forms a new B—N bond also forms hydrogen, as illustrated in reactions [4] and [5]:


NH3BH3+NH3BH2—NH2BH3→NH3BH2—NH2BH2—NH2BH3+H2  [4]


NH3BH3+NH3BH2NH2BH2—NH2BH3→NH3BH2—(NH2BH2)2—NH2BH3+H2  [5]

Baitalow et al. further report at temperatures greater than 150° C., additional hydrogen may be released as illustrated in reactions [6] and [7]:


(NH3BH2NH2BH2—NH2BH3)n→(NH3BH2NH2BH═NHBH3)n+H2  [6]




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stats Patent Info
Application #
US 20090258215 A1
Publish Date
10/15/2009
Document #
File Date
12/31/1969
USPTO Class
Other USPTO Classes
International Class
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20091015|20090258215|bulk-scaffolded hydrogen storage and releasing materials and methods for preparing and using same|Compositions are disclosed for storing and releasing hydrogen and methods for preparing and using same. These hydrogen storage and releasing materials exhibit fast release rates at low release temperatures without unwanted side reactions, thus preserving desired levels of purity and enabling applications in combustion and fuel cell applications. |Battelle-Memorial-Institute
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